Toner formulations

Abstract

A dry, powder electrostatic toner having polyester resin as a binder, pigment as a colorant, charge control ingredients polyethylene wax as a release agent, and extra particulate elements to improve flow and to scrub the doctor blade, one extra particular element is hydrophilic rutile acicular titanium oxide with aluminum oxide surface treatment, two silicas are blended within the bulk of the toner, one of BET surface area of about 30 m2/g and one of BET surface area of about 380 m2/gn; and an organoboron complex negative exchange control agent is blended with a quaternary ammonium salt of an aluminosilicate compound negative charge control agent. Improved functioning as a toner is realized.

What is claimed is:  
     
       1. A dry, powder electrostatic toner having as an extraparticulate coating particles of hydrophilic rutile acicular titanium oxide with aluminum oxide surface treatment. 
     
     
       2. The toner as in  claim 1  also comprising hydrophobic silica as an extraparticulate coating. 
     
     
       3. The toner as in  claim 2  in which said toner has a binder resin of polyester. 
     
     
       4. The toner as in  claim 1  in which said toner has a binder resin of polyester. 
     
     
       5. A dry powder electrostatic toner having a branched polyester resin binder, a wax release agent in said toner, and two particulate silicas blended into said toner, one of said two silicas have low BET specific surface area and being hydrophobic, the other of said two silicas being untreated and having high BET specific surface area. 
     
     
       6. The toner as in  claim 5  in which said wax is polyethylene of Mn of about 500. 
     
     
       7. The toner as in  claim 6  in which said polyethylene is of Mn of 500. 
     
     
       8. A dry, powder electrostatic toner having a branched polyester resin binder and an organoboron complex as a negative charge control agent and a quaternary ammonium salt of an aluminosilicate as a negative charge control agent. 
     
     
       9. The toner as in  claim 8  in which said organoboron complex is in an amount by weight to the weight of said quaternary ammonium salt of an aluminosilicate compound of from 2 to 1 to 1 to 2.